Copy of Understanding Pixel and Resolution

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Transcript of Copy of Understanding Pixel and Resolution

Understanding Pixel and ResolutionBasic attributes of pixel-based images: DimensionThe dimensions of the pixel grid (pixel dimensions) refer to the number of pixels along its width and height.Bit Depthtells Photoshop how many shades or colors the image can containPixelIn digital imaging, a pixel, or pel, (picture element) is a physical point in a raster image, or the smallest addressable element in a display device; so it is the smallest controllable element of a picture represented on the screen. Color Model/ Image Modeis the one that dictates whether all those numbers represent either shades of gray or colors, and how many.

ResolutionResolution answers the question “How small are the tiny squares that make up this picture?” Once you bring an image into the physical world, the number of pixels across the width and height take up a specific amount of physical space in print or on screen, and that determines the resolution. The resolution of an image is the number of pixels per unit of measurement.

Two different kinds of resolution: Dots per inchThis refers to the number of dots per inch that an inkjet printer is capable of applying to a sheet of paper.

Pixels per inchIt refers to the distance between the pixels that make up digital images.How Resolution